История коммитов

- Add DownloadFileController and DownloadFileUseCase for GET /mail/load/{id}
- Add incrementDownloadCount to MailMessageRepositoryInterface and EloquentMailMessageRepository
- Fix route definitions: remove trailing slashes so rtrim() in index.php matches correctly
- Set legacy /mail route to priority -1 so new ContactController takes precedence on GET
- Remove MailLegacyRedirectResolver (unused in a non-public module)
- Update stale URLs: ../profile/?act=office -> /profile/?act=office, ?act=write&id=X -> /mail/write/X, ?act=load&id=X -> /mail/load/X

- Add controllers: IndexController, SettingsController, ClearController
- Add use cases: GetNotificationListUseCase, SaveSettingsUseCase, ClearNotificationsUseCase
- Add NotificationRepositoryInterface and EloquentNotificationRepository
- Add AuthorizedUserMiddleware; replace legacy user check in routes
- Replace legacy catch-all route with clean URLs: /notifications/, /notifications/settings/, /notifications/clear/
- Migrate Installer to src/Install/ with updated namespace
- Add config/services.php with DI wiring and Counters class alias
- Update templates: remove layout args, add output escaping
- Fix guestbook_comment → guestbook_comments counter key bug
- Remove legacy index.php and includes/

- Slug paths for categories: /downloads/{slug}/ and /downloads/{parent}/{child}/
- Slug paths for files: /downloads/{cat-path}/{slug}-{id}/
- 301 redirects from legacy ?id= query URLs to slug URLs
- New services: DownloadCategoryPathService, DownloadFilePathService, DownloadSlugService, DownloadLegacyRedirectResolver
- New controllers: DownloadPathController (catch-all router), DownloadCategoryController
- Installer updated: slug column + unique(refid, slug) constraint on both tables
- Data converter: install/downloads_slug_converter.php for existing installations
- All admin controllers and templates updated to use slug URLs (no old ?id= or /files/{id}/ links remain)

- Add slug columns to library_cats (unique parent+slug) and library_texts
- Add LibraryCategoryPathService and LibraryArticlePathService for path resolution
- Add LibrarySlugService for unique slug generation
- Add LibraryPathController as catch-all dispatcher (mirrors ForumPathController)
- Replace /library/section/{id} and /library/article/{id} routes with /library/{path}
- Update all controllers, templates, and LegacyRedirectHandler to use slug URLs
- Add install/library_slug_converter.php to regenerate slugs from names

# Conflicts:
# composer.json

Split into RegistrationController and ConfirmEmailController.
Extracted user creation and email sending into RegisterUserUseCase.
Added RegistrationFormDTO for passing validated form data.
Email confirmation now uses clean URL /registration/confirm-email.